Genuine OEM Audi Coolant Hose, part number 8P0122061. This hose is designed to transport coolant within the engine cooling system, ensuring optimal thermal management. It is marked as number 5 in the provided diagram. The hose is constructed from heat-resistant, reinforced rubber to withstand high temperatures and pressure fluctuations. Genuine OEM hoses are essential for maintaining correct routing geometry and fluid resistance, preventing leaks and ensuring the long-term reliability of the cooling system.